A great deal of recent research has been focused on the photonic engineering of highly non-classical, non-Gaussian states of light, aiming to achieve enhanced entanglement and other desirable properties.
Indeed, non-Gaussian features are essential for various quantum information tasks, such as
entanglement distillation [1]}, [2]}, [3]}, [4]}, [5]}, [6]}, [7]}, [8]},
noiseless linear amplification [9]}, [10]}, [11]}, [12]}, [13]}, [14]},
and quantum computation [15]}, [16]}, [17]}, [18]}.
In entanglement distillation and noiseless linear amplification, non-Gaussian features are a requirement due to the impossibility of distilling (or amplifying) entanglement in a pure Gaussian setting [19]}.
In universal quantum computation, non-Gaussian features are indispensable if quantum computational advantages are to be obtained [20]}.
